MongoDB C100DBA Exam Practice Test Instant Access

Question 1

Which features of relational database management systems were deliberately omitted in MongoDB and help us to obtain horizontal scalability? Check all that apply.

AMulti-statement transactions

BJoins

CAuthentication

Answer : A, B

Question 2

In order to ensure that you can maintain high availability in the face of server failure, you should implement which of the following?

ASharding

BProperly defined user roles

CReplication

DPut indexes on all of your documents

EThe proper storage engine

Answer : C

Question 3

Which of the following is a valid insert statement in mongodb? Select all valid.

Adb.test.push({x:2,y:'apple'})

Bdb.test.insert'x':2, 'y':'apple'})

Cdb.test.insert({x:2,y:'apple'})

Ddb.test.insert({x:2},{y:'apple'})

Answer : B, C

Question 4

To add a new user and enable authentication in MongoDB, which of the following steps need be executed?

Aupdate users collection and restart mongodb

BAll of the above

Cupdate users collection and restart mongodb with -auth option

Dupdate users collection and run db.enableAuthenticationQ

Answer : C

Question 5

Which of the following command is used to get all the indexes on a collection?

Adb.collection.showIndexes()

Bdb.collection.findlndexes()

Cdb.showIndexes()

Ddb.collection.getlndexesQ

Answer : D

Question 6

In a replica set, a_________number of members ensures that the replica set is always able to select a primary.

AEven

BOdd

DDepends on the application architecture

Answer : B

Question 7

Which of the following operators is used to updated a document partially?

A$set

B$update

C$project

D$modify

Answer : A

MongoDB C100DBA MongoDB Certified DBA Associate Exam Practice Test